09/22/2017 at 19:45 •
I have bought cheap Chinese "X-40" laser tape.
I disassembled it and found that it is really contains laser module that I reverse engineered earlier:
But the module version is "701A", it's not like "512A" that I bought earlier:
It can been seen that some components are placed at another places.
I want to continue reverse engineering: measure some parameters like APD voltage, desolder some SMD components and measure their values. It can help me to increase parameters of laser rangefinder module.
08/27/2017 at 17:31 •
I have tried to switch laser modulation frequency to lower frequency.
I have tested several frequencies. The lowest frequency still was working fine is 25 MHz. I found that amplitude of signal decrease to 0.65 of initial value (at 150 MHz).
I think that I need to make additional configuration of Si5351 PLL to set modulation frequency to lower frequency. My target is to set modulation frequency to 15 Mhz.
Why I need lower frequency? To increase unambiguity distance - at 15 MHz is would be 10 m.